AS134351 Leaseweb Japan K.K. — ASN Info Lookup

AS134351Leaseweb Japan K.K.IDC

WHOIS Topology

Japan · APNICleaseweb.com

Hosts top sitesTor relaysVPN servicesVPS hosting

IPv4 addresses

21,248

51 announced prefixes

IPv6 addresses

7.92 × 10²⁸

2 announced prefixes

BGP neighbours

…

CAIDA rank

#16,044

Customer cone 1 ASNs

Estimated users

18.2K

APNIC Labs estimate

RPKI

100% valid

0 invalid · 0 not covered

Average purity

341 sampled IPs

IXPs / facilities

0 / 0

Operator self-reported

History

How prefixes were announced and changed hands, registration changes, and outage or hijack incidents.

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IP ranges

Currently announced prefixes with their RIR registration and geolocation.

Prefix	RPKI	Registration	Geolocation	Addresses
23.81.40.0/21	Valid	LEASEWEB-JPAPNIC	Japan	2,048
23.106.224.0/21	Valid	LEASEWEB-JPAPNIC	Tokyo	2,048
23.26.44.0/22	Valid	—	Japan	1,024
142.91.108.0/22	Valid	LEASEWEB-JPAPNIC	Japan	1,024
173.234.64.0/22	Valid	LEASEWEB-JPAPNIC	Japan	1,024
108.165.82.0/23	Valid	—	Japan	512
108.165.180.0/23	Valid	—	Tokyo	512
142.91.104.0/23	Valid	LEASEWEB-JPAPNIC	Japan	512
142.91.106.0/23	Valid	LEASEWEB-JPAPNIC	Japan	512
188.116.6.0/23	Valid	JP-188RIPE	Tokyo	512
195.40.70.0/23	Valid	LT-CODE200-20080305-GTTRIPE	Tokyo	512
195.40.120.0/23	Valid	LT-CODE200-20080305-GTTRIPE	Tokyo	512
195.40.122.0/23	Valid	LT-CODE200-20080305-GTTRIPE	Tokyo	512
195.40.160.0/23	Valid	LT-CODE200-20080305-GTTRIPE	TokyoCross-border	512
5.188.222.0/24	Valid	OPENWAY-NETWORKRIPE	Tokyo	256
23.26.53.0/24	Valid	—	Japan	256
23.26.61.0/24	Valid	—	Japan	256
23.27.14.0/24	Valid	—	Japan	256
23.27.23.0/24	Valid	—	Japan	256
23.27.127.0/24	Valid	—	Japan	256

/24 block profile

One square per /24: colour shows the risk type, shade how many addresses are flagged, stripes mark datacenter blocks. Click a square to see all 256 addresses.

/24s with data 50 / 83 （60%） · flagged 42

No risk flagsDatacenter (no flags)ProxyVPNAbuse / blocklistTorDarker = more flagged addresses; dashed = block screen only

23.81.40.0/215/8 with data · 3 flagged

23.26.44.0/223/4 with data · 2 flagged

142.91.108.0/222/4 with data · 2 flagged

108.165.82.0/232/2 with data · 2 flagged

108.165.180.0/232/2 with data · 2 flagged

142.91.104.0/232/2 with data · 2 flagged

195.40.70.0/232/2 with data · 2 flagged

195.40.120.0/232/2 with data · 2 flagged

195.40.122.0/232/2 with data · 2 flagged

23.106.224.0/211/8 with data · 0 flagged

173.234.64.0/221/4 with data · 1 flagged

142.91.106.0/231/2 with data · 1 flagged

Hover a square for its numbers; click to see all 256 addresses.

Each prefix shows its 64 /24s with the most data. Built daily from lookups, neighbour sampling, public lists and block screening.

IP reputation

IPs from this network that CleanIP has analysed: purity, abuse reports and the riskiest /24 blocks.

Purity distribution

85–100 070–84 24650–69 930–49 2

9.98%

Share of IPv4 reported or blocklisted

2,121

Listed IPs

341

Analysed IPs

Riskiest /24 blocks

/24 block	Flagged	Analysed
108.165.83.0/24	11	11
23.26.47.0/24	8	8
195.40.123.0/24	7	10
142.111.34.0/24	7	7
23.26.46.0/24	6	7
108.165.180.0/24	4	6
142.111.67.0/24	4	6
195.40.70.0/24	4	6
23.27.127.0/24	4	6
23.26.61.0/24	4	5

Flagged = VPN, proxy, Tor or purity below 50. Samples come from user lookups and neighbour sampling, not every address in this network.

Geography

Where this network’s IPv4 addresses are located.

Japan98.8%
United States1.2%

Scope: Regional
In registered country: 98.8%

Estimated by sampling IPv4 ranges against a geolocation database.

Traffic observation

AS134351 · Last 7 days

Mobile vs. Desktop

Desktop89.5%Mobile10.5%

Bot vs. Human

Human33.0%Bot67.0%

Adoption & Usage

Adoption and usage of key protocols

Internet Protocol (IP) Version

IPv492.2%IPv67.8%

HTTP Version

HTTP/1.x

35.5%HTTP/2

64.0%HTTP/3

0.5%

HTTP vs. HTTPS

94.0% HTTPS (encrypted)

Plain HTTP 6.0%

TLS Version

TLS 1.0/1.1< 0.1%TLS 1.22.7%TLS 1.396.8%QUIC0.5%

Security & Attacks

Insights into network and application layer attack traffic

Layer 7 Attacks

POST

56.4%GET

36.2%HEAD

6.9%OPTIONS

0.5%

BGP Announcements

Hourly BGP route announcements over the last 7 days

264,417

7-day total

8,745

Hourly peak

Data: Cloudflare Radar, licensed under CC BY-NC 4.0

Activity

Hourly traffic over the last 7 days, normalized to this network’s peak.

Fairly flat around the clock, typical of server or hosting networks.

	00						06						12						18
Mon
Tue
Wed
Thu
Fri
Sat
Sun

Times in UTCLessMore

Peak hour: 07:00–08:00
Active hours: 24 hrs
Weekend vs weekday: Weekdays ≈ weekends
Busiest day: Fri

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BGP upstreams and neighbours

AS134351Standalone page

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WHOIS record

The registry’s record for this AS number: holder, status, dates and contacts.

Sources

Where the information on this page comes from and when it was updated.

Information	Source	Updated
Registered country	RIR daily delegation statistics	2026-10-22
Registered address & allocation date	RIR registration data (RDAP)	2026-10-03
Organization & company country	AS-to-organization data	2026-10-21
Network type	CleanIP ASN canon	2026-10-21
Announced prefixes & BGP neighbours	Public BGP routing data	2026-10-22
IPv4 geography	Geolocation database	—
RPKI validation	RPKI ROA validation data	2026-10-22
Rank & customer cone	CAIDA AS Rank	2026-10-01
Estimated users (APNIC)	APNIC Labs user estimates	2026-10-19
Network tags	Public routing data community tags	2026-10-22
IP reputation	CleanIP lookups and neighbour sampling	—

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